Evaporator



Oct. 21, 1930. LENMNG 1,779,135

EVAPORATOR File d June 1, 1929 L L, INVENTOR BY J lj- TORNEY Patented@ct. 21, 1930 UNITED STATES- PATENT OFFICE ALVAR LENNING, OF JACKSONBEIGH'IS, NEW YORK, .ASSIGNOR TO ELECTROL'UX SEBVEL CORPORATION, OF NEWYORK, N. Y., A CORPORATION OF DELAWARE EVAPOBATOR Application med June1, 1929. Serial 110. 367,658.

My invention relates to refrigerators and more particularly torefrigerator. cabinetsand that portion of automatic refrigeratingapparatus which is inside the food space of such cabinets... Such partis generally called the evaporator because it comprises that portion ofthe apparatus in which evaporation takes place to remove heat from thesurroundings.

The object of my invention is to provide an evaporator which combinesefficiency of heat transfer with adaptability to the food space forobtaining a maximum of effective food space and which is neat inappearance.

The nature of the invention will become apparent from consideration ofthe following description taken in connection with the accompanyingdrawing showing a preferred form of the invention, which drawing is apart of this specification.

On the accompanying drawing:

Fig. 1 is a sectional View of a refrigerator cabinet according toinvention, looking downwardly and taken on line 1-1 of Fig. 2; and

Fig. 2 is an elevational sectional view taken on the line 22 of Fig. 1.

The refrigerator cabinet 10 comprises a food space 11 and an apparatuscompartment 12. The food space is bounded by walls 13 and is surroundedby insulation 14. The apparatus compartment. contains parts of automaticrefrigerating apparatus which may be of the type disclosed in Patent N0. 1,609,334 granted December 7, 1926, to Von Platen and Munters.

The evaporator, designated generally by reference character 15 comprisesa shell 16 which is preferably cylindrical in form and includes a numberof discs 17 which are apertured with holes having raised rims forholding pools of refrigerant. The discs are arranged as in the aforesaidPatent No. 1,609,334 to give tortuous fiow of fluids. The shell ispreferably made of steel. It is situatedto one side of the food space asshown in Fig. 1.

It may be supplied with a refrigerant and an inert gas into which therefrigerant diffuses, the gas mixture formed being withdrawn to thecustomary absorber.

The casting has a ,recess 20 curved to fit the I outer contour of shell16 and arms 21 for securing the casting member to shell 16. The a heattransmitting means also comprises a back casting member 22 comprising aplatelike web 23 which is of substantial hei ht as shown in Fig. 2 andwhich extends su%stantially across the entire food space. Member 22extends to the right of shell 16 as shown and is curved to fit shell 16and is provided with four or more bolt holes through which or into whichbolts 24 are passed or screwed in order to pull member 21 toward member22 and to clamp these members around shell 16. Web 23 extendssubstantially at right angles to the direction of extension of, member18. On the forward side of web 23 is a series of vertical fins 25 whichextend the full height of the web. Web 23 is supported at its outer endby one or more brackets 26. The shell 16 is supported principally by theconduits 27 and 28 which supply fluid thereto and conduct fiuidtherefrom.

A series of fins 29 extend vertically on one side of the freezingcompartment 19; the side nearer to web 23. A plate 30 extends in frontof web 23 and to the left-hand side (as shown) of member 18, that is, tothe food side of fins 29. Projections 31 are provided on the castingmembers to permit fastening plate 30 in place. A plate 32 is securedover the front of member 18 with an opening to give access to thefreezing chamber. Plates 30 and 32 are preferably porcelained on theoutside. Being spaced from web 23 and member 18, air passages 34 areprovided for conducting air downwardly past the evaporator into the partof the food space below the evaporator. A cover may be placed over thefront of the compartment 19, in which case the cover together with theplates 32 and 30 completely cover casting members from view and presenta neat appearance.

My improved evaporator gives heat transmission to all parts of the foodspace and serves to evenly.,distribute the cold produced. At the sametime the arrangement provides an eflicient circulation of air past theevaporator surface. Also, the evaporator is compact and provides amaximum of food space for the amount of extended surface.

Reference character 36 designates a shelf supported by the side wall 13and by. hooks formed on members 31 midway of the side of the freezingchamber. For defrosting purposes a pan 37 is provided under web 23 whichdrains into a larger drain pan 38 under th shell and freezing chamber.

While I have shown and described one form of the invention it will beunderstood that the invention is not limited to the form shown anddescribed, but is to be considered in the light of the appended claimstaken in connection with the state of the prior art.

WVhat I claim is:

1. In combination-with a refrigerator cabinet having walls defining afood space, an evaporatoncomprising a shell in said food space, a frontcasting member comprising means for holding material to be frozen, aback casting member comprising a web and extending substantially acrossthe food space and means for clamping the casting members to said shell.

2. In combination with a refrigerator cabinet having walls defining afood space, an evaporator comprising a vertically disposed cylindricalshell in said food space and to one side thereof, apertured discs withinsaid shell for holding pools of refrigerant, a front casting member comrising means for holding material to be rozen, a back casting membercomprising a web and extending substantially across the food space andmeans ffirnclamping the casting members to said s e 3. In combinationwith a refrigerator cabinet' having walls defining a food space, anevaporator comprising a shell in said food space to one side thereof, afront casting member comprising means for holding material to be frozen,vertically extending fins on said casting member, a back casting membercomprising a narrow web of substantial ver tical extent and extendingsubstantially, across the food space, vertically extending fins on saidweb and means for clamping the casting members to said shell.

4. In combination with a refrigerator cabinet having Walls defining afood space an I evaporator comprising a shell in said ood space and toone side thereof, a front casting member comprising means for holdingice trays, a back casting member comprising a web and extendingsubstantially across the Mamas 7 food space, means for clamping thecasting membersto said shell and a plate extending in front of said weband to the side of said front casting member adjacent thereto.

5. In combination with a refrigerator cabinet having Walls defining afood space, an evaporator comprising a shell in saidfood space and toone side thereof, a front casting member comprising means for holdingmaterial to be frozen extending forwardly of said shell and to one sideof said food space, a back casting member comprising a Web and extendingsubstantially across the food space, fins on the forward side of saidweb, fins on the side of the front casting member adj acent said-web,means for clamping castings to said'shell and a plate extending in frontof the fins on the web and on the front casting member.

6. An evaporator comprising a shell, a casting member comprising meansfor holding material to be frozen extending outwardly from said shell, asecond casting member comprising a plate-like web extending outwardlyfrom said shell at substantially right angles to the extent of the firstmentioned casting member from the shell and means for clampingsaid'casting members to said shell.

In testimony whereof I have afiixed my signature.

ALVAR LENNING.

